<template>
	<view class="search-box">
	  <!-- 使用 uni-ui 提供的搜索组件 -->
	  <uni-search-bar  @input="input" :radius="100" cancelButton="none"></uni-search-bar>
		<!-- 搜索建议列表 -->
		<view class="sugg-list" v-if="searchResults.length !== 0">
		  <view class="sugg-item" v-for="(item, i) in searchResults" :key="i" @click="gotoDetail(item.goods_id)">
		    <view class="goods-name">{{item.goods_name}}</view>
		    <uni-icons type="arrowright" size="16"></uni-icons>
		  </view>
		</view>
		<!-- 搜索历史 -->
		<view class="history-box" v-else>
			<view class="history-title">
				<text>搜索历史</text>
				<uni-icons @click="cleanHistory" type="trash" size="17"></uni-icons>
			</view>
			<view class="history-list">
				<uni-tag :text="item" v-for="(item, i) in historylist" :key="i"
				@click="gotoGoodsList(item)"></uni-tag>
			</view>
		</view>
	</view>
	<!-- 搜索建议列表 -->
	
</template>

<script>
	export default {
		data() {
			return {
				timer: null,
				// 搜索关键词
				kw: '',
				// 搜索结果列表
				searchResults: [],
				// 搜索历史数据
				historylist: ['a','b','c']
			}
		},
		methods: {
			input(e) {
			    // e.value 是最新的搜索内容
				// console.log(e)
				clearTimeout(this.timer)
			    this.timer = setTimeout(()=>{
					console.log(e)
					this.kw = e;
					this.getSearchList()
				},500)
			  },
			  getSearchList: async function(){
				  if(this.kw === ''){
					  this.searchResults = []
					  return
				  }
				  const {data: res} = await uni.$http.get('/api/public/v1/goods/qsearch', { query: this.kw })
				  if (res.meta.status !== 200) return uni.$showMsg()
				  this.searchResults = res.message
				  this.saveSearchHistory()
			  },
			  gotoDetail(goods_id) {
			    uni.navigateTo({
			      // 指定详情页面的 URL 地址，并传递 goods_id 参数
			      url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods_id
			    })
			  },
			  saveSearchHistory(){
				  // this.historylist.push(this.kw);
				  const set =new Set(this.historylist);
				  set.delete(this.kw)
				  set.add(this.kw)
				  this.historylist = Array.from(set);
				  // 持久化存储
				  uni.setStorageSync('kw',JSON.stringify(this.historylist))
			  },
			  cleanHistory(){
				  // 清空历史记录
				  this.historylist = []
				  uni.setStorageSync('kw','[]')
			  },
			  gotoGoodsList(kw){
				  uni.navigateTo({
				  	url:'/goods_list/goods_list?query' + kw
				  })
			  }
		},
		computed:{
			histories(){
				return [...this.historylist.reverse()]
			}
		},
		onLoad() {
			this.historylist = JSON.parse(uni.getStorageSync('kw' || '[]'))
		}
	}
</script>

<style lang="scss">
	.uni-searchbar {
	  /* #ifndef APP-NVUE */
	  display: flex;
	  /* #endif */
	  flex-direction: row;
	  position: relative;
	  padding: 16rpx;
	  /* 将默认的 #FFFFFF 改为 #C00000 */
	  background-color: #3cc068;
	}
	.search-box {
	  position: sticky;
	  top: 0;
	  z-index: 999;
	}
	.sugg-list {
	  padding: 0 5px;
	
	  .sugg-item {
	    font-size: 12px;
	    padding: 13px 0;
	    border-bottom: 1px solid #efefef;
	    display: flex;
	    align-items: center;
	    justify-content: space-between;
	
	    .goods-name {
	      // 文字不允许换行（单行文本）
	      white-space: nowrap;
	      // 溢出部分隐藏
	      overflow: hidden;
	      // 文本溢出后，使用 ... 代替
	      text-overflow: ellipsis;
	      margin-right: 3px;
	    }
	  }
	}
	.history-box {
	  padding: 0 5px;
	
	  .history-title {
	    display: flex;
	    justify-content: space-between;
	    align-items: center;
	    height: 40px;
	    font-size: 13px;
	    border-bottom: 1px solid #efefef;
	  }
	
	  .history-list {
	    display: flex;
	    flex-wrap: wrap;
	
	    .uni-tag {
	      margin-top: 5px;
	      margin-right: 5px;
	    }
	  }
	}
</style>
